基于物质点法的高速公路弃渣场稳定性及灾害动力学分析  

Stability and disaster dynamics analysis of highway debris dump site based on material point method

作　　者：孙文超 王君豪 徐文杰[2] 董晓阳 任禾 王洪兵 张学杰 王恒威 SUN Wen-chao;WANG Jun-hao;XU Wen-jie;DONG Xiao-yang;REN He;WANG Hong-bing;ZHANG Xue-jie;WANG Heng-wei(Broadvision Engineering Consultants,Kunming,Yunnan 650011,China;State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China;School of Engineering&Technology,China University of Geosciences(Beijing),Beijing 100083,China;Yunnan Communications Investment&Construction Group Co.,Ltd.,Kunming,Yunnan 650103,China;Yunnan Tiankun Human Resource Management Co.Ltd.,Kunming,Yunnan 650220,China)

机构地区：[1]云南省交通规划设计研究院股份有限公司,云南昆明650011 [2]清华大学水圈科学与水利工程全国重点实验室,北京100084 [3]中国地质大学(北京)工程技术学院,北京100083 [4]云南交投集团投资有限公司,云南昆明650103 [5]云南天坤人力资源管理有限公司,云南昆明650220

出　　处：《岩土力学》2025年第3期991-1000,共10页Rock and Soil Mechanics

基　　金：公路弃渣场失稳灾害评估及防治关键技术研究与运用示范资助(No.YCIC-YF-2022-09)。

摘　　要：随着我国山区高速公路建设的不断推进,弃渣场地的稳定性及致灾机制成为工程建设评估的重要因素之一。为了实现弃渣场的稳定性、失稳灾害动力学全过程的分析,基于面向GPU并行高性能计算软件CoSim中的物质点法(material point method,简称MPM),引入强度折减法(strength reduction method,简称SRM)开展相关研究工作。为了验证算法的合理性,以典型均质边坡为例,采用基于MPM的强度折减法与极限平衡法(limit equilibrium method,简称LEM)进行了对比,表明两者无论在稳定系数Fs还是在潜在滑动面上均具有良好的一致性。在此基础上,以云南某高速公路弃渣场降雨诱发失稳灾害为例,对其在天然工况和暴雨工况下稳定性和失稳过程进行了分析。结果表明,该弃渣场边坡在天然状态下处于稳定状态,而在暴雨工况下会发生失稳和大变形滑动;数值模拟和现场调查结果吻合较好,表明了提出的方法在弃渣场边坡稳定性与大变形失稳动力学分析中有强大的优势,可以实现斜坡的“稳定性→大变形→流动→堆积”的全过程分析。With the continuous advancement of highway construction in mountainous regions in China,the stability and disaster-causing mechanisms of waste dump sites have become one of the important factors in project construction evaluation.To achieve a comprehensive analysis of the stability and dynamic processes of instability disasters at waste dump sites,this paper introduces the strength reduction method(SRM)based on the material point method(MPM)in CoSim,a GPU-oriented parallel high-performance computing software.To verify the rationality of the algorithm,the MPM-SRM is compared with the limit equilibrium method(LEM)for a typical uniform slope.The results show that the two methods exhibit good consistency in both the factor of safety Fs and the potential sliding surfaces.Based on this,a case study of a highway waste dump site in Yunnan Province where rainfall-induced instability occurred is analyzed under both natural and heavy rainfall conditions.The results indicate that the slope of the waste dump site is stable under natural conditions,but becomes unstable and experiences large sliding deformation during heavy rainfall.The numerical simulation results correspond well with field investigation findings,demonstrating that the method proposed in this paper has significant advantages in stability analysis and dynamic analysis under large deformation of waste dump site slopes.It can simulate the entire process of slope behavior,from stability to large deformation,flow,and deposition.

关 键 词：物质点法 强度折减法 稳定性分析 稳定系数 弃渣场 

分 类 号：P642[天文地球—工程地质学]